Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
유무상생의 원칙은 모든 생명체가 서로 의존한다는 것을 의미합니다.yumusangsaeng-ui wonchik-eun modeun saengmyeongche-ga seoro uijonhandaneun geos-eul uimihae.The principle of mutual existence means that all living beings depend on each other.